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# Curtin is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# Curtin is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
# more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Curtin. If not, see <http://www.gnu.org/licenses/>.
# Mini six like module (so that this code can be more easily extracted).
import sys
PY26 = sys.version_info[0:2] == (2, 6)
PY27 = sys.version_info[0:2] == (2, 7)
PY2 = PY26 or PY27
PY3 = sys.version_info[0:2] >= (3, 0)
if PY3:
text_type = str
binary_type = bytes
string_types = (text_type, text_type)
import io
StringIO = io.StringIO
else:
text_type = unicode
binary_type = bytes
string_types = (binary_type, text_type)
from StringIO import StringIO # noqa
# Taken from six (remove when we can actually directly use six)
def add_metaclass(metaclass):
"""Class decorator for creating a class with a metaclass."""
def wrapper(cls):
orig_vars = cls.__dict__.copy()
slots = orig_vars.get('__slots__')
if slots is not None:
if isinstance(slots, str):
slots = [slots]
for slots_var in slots:
orig_vars.pop(slots_var)
orig_vars.pop('__dict__', None)
orig_vars.pop('__weakref__', None)
return metaclass(cls.__name__, cls.__bases__, orig_vars)
return wrapper
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